allow users to set categories on their posts

[friendica.git] / include / text.php

diff --git a/include/text.php b/include/text.php
index 191f4fca8ab5d04b4d4218fbabbefa84a61973dd..f204e3f9b97dda32ef1da0a67433d362957eae6e 100644 (file)
--- a/include/text.php
+++ b/include/text.php
@@ -1314,6 +1314,118 @@ function file_tag_file_query($table,$s,$type = 'file') {
        return " AND " . (($table) ? dbesc($table) . '.' : '') . "file regexp '" . dbesc($str) . "' ";
 }
 
+// ex. given music,video return <music><video> or [music][video]
+function file_tag_list_to_file($list,$type = 'file') {
+        $tag_list = '';
+        if(strlen($list)) {
+                $list_array = explode(",",$list);
+                if($type == 'file') {
+                       $lbracket = '[';
+                       $rbracket = ']';
+               }
+                else {
+                       $lbracket = '<';
+                       $rbracket = '>';
+               }
+
+                foreach($list_array as $item) {
+                 if(strlen($item)) {
+                               $tag_list .= $lbracket . file_tag_encode(trim($item))  . $rbracket;
+                       }
+                }
+       }
+        return $tag_list;
+}
+
+// ex. given <music><video>[friends], return music,video or friends
+function file_tag_file_to_list($file,$type = 'file') {
+        $matches = false;
+        $list = '';
+        if($type == 'file') {
+                $cnt = preg_match_all('/\[(.*?)\]/',$file,$matches,PREG_SET_ORDER);
+       }
+        else {
+                $cnt = preg_match_all('/<(.*?)>/',$file,$matches,PREG_SET_ORDER);
+       }
+       if($cnt) {
+               foreach($matches as $mtch) {
+                       if(strlen($list))
+                               $list .= ',';
+                       $list .= file_tag_decode($mtch[1]);
+               }
+       }
+
+        return $list;
+}
+
+function file_tag_update_pconfig($uid,$file_old,$file_new,$type = 'file') {
+        // $file_old - categories previously associated with an item
+        // $file_new - new list of categories for an item
+
+       if(! intval($uid))
+               return false;
+
+        if($file_old == $file_new)
+               return true;
+
+       $saved = get_pconfig($uid,'system','filetags');
+        if(strlen($saved)) {
+                if($type == 'file') {
+                       $lbracket = '[';
+                       $rbracket = ']';
+               }
+                else {
+                       $lbracket = '<';
+                       $rbracket = '>';
+               }
+
+                $filetags_updated = $saved;
+
+               // check for new tags to be added as filetags in pconfig
+                $new_tags = array();
+                $check_new_tags = explode(",",file_tag_file_to_list($file_new,$type));
+
+               foreach($check_new_tags as $tag) {
+                       if(! stristr($saved,$lbracket . file_tag_encode($tag) . $rbracket))
+                               $new_tags[] = $tag;
+               }
+
+               $filetags_updated .= file_tag_list_to_file(implode(",",$new_tags),$type);
+
+               // check for deleted tags to be removed from filetags in pconfig
+                $deleted_tags = array();
+                $check_deleted_tags = explode(",",file_tag_file_to_list($file_old,$type));
+
+               foreach($check_deleted_tags as $tag) {
+                       if(! stristr($file_new,$lbracket . file_tag_encode($tag) . $rbracket))
+                               $deleted_tags[] = $tag;
+               }
+
+                foreach($deleted_tags as $key => $tag) {
+                       $r = q("select file from item where uid = %d " . file_tag_file_query('item',$tag,$type),
+                               intval($uid)
+                       );
+
+                       if(count($r)) {
+                               unset($deleted_tags[$key]);
+                       }
+                       else {
+                               $filetags_updated = str_replace($lbracket . file_tag_encode($tag) . $rbracket,'',$filetags_updated);
+                       }
+               }
+
+                if($saved != $filetags_updated) {
+                       set_pconfig($uid,'system','filetags', $filetags_updated);
+                }
+               return true;
+       }
+        else
+                if(strlen($file_new)) {
+                       set_pconfig($uid,'system','filetags', $file_new);
+                }
+               return true;
+}
+
 function file_tag_save_file($uid,$item,$file) {
        $result = false;
        if(! intval($uid))